‘You think you’re alone in the dark. Close your eyes. Remember everything good.’ My mom said that to me just before she died. Smart lady.

Gibbs: We're doing this the hard way.
Judith: I like the hard way.

I'm not alone.

Catherine: The infamous Agent Gibbs.
Gibbs: Lady, save your breath. You're barking up the wrong tree.
Taft: Oh, Gibbs?
Gibbs: Look, if you want to quit, quit, okay? I don't need you. I don't need your shrink. I don't need whoever would take your place.
Taft: Gibbs, this is Catherine. My wife.

[after killing Salim] Let's go home.

Never leave behind loose ends. (Season 3, Episode 24)

Rule #45

Gibbs: Yeah, Gibbs.
McGee: Hey boss, how's Tel Aviv?
Abby: Forget Tel Aviv, how's Tony? How's Ziva? Are they talking yet?
Gibbs: They're fine Abby.
Abby: I take that as a no. So how's Israel?

McGee: Boss do you think I made the right decision with my father?
Gibbs: To be the bigger man? Maybe it's time he learned from you, McGee.

Never date a coworker. (Season 1, Episode 15, and referenced on other occasions)

Rule #12

McGee: Red handed?
Gibbs: They don't come much redder.

Tony: I have to break one of your rules, boss. Number six: never say you're sorry. I let things get out of control in the hotel room.
Gibbs: Ah, it's covered. Rule eighteen.
Tony: Oh, yeah. It's better to seek forgiveness than ask permission. Am I forgiven?
Gibbs: No.

Bishop: Well. You are telling me to talk about my feelings? All right. Tell me Gibbs, how have you processed getting shot? Who is it you're opening up to?
Gibbs: Dr. Taft. I've been talking with him since the Sudan case. Everyone reaches a point, Bishop. Even me. You just got to take the first step.
Bishop: But I can't.
Gibbs: Rule #28. When you need help, ask.

NCIS Quotes

‘You think you’re alone in the dark. Close your eyes. Remember everything good.’ My mom said that to me just before she died. Smart lady.

Gibbs

McGee: All right. Well you should probably know that Abby and I used to date?
Bishop: Ew. Like, each other?
McGee: Yeah.
Bishop: Wait - isn't that a violation of rule 12, never date a....
McGee: It was a long time ago. After we'd broken up, one night I went to her lab. Found a scribbled piece paper; a list. Potential boyfriends had to fulfill certain conditions by a pre-arranged date or else, goodbye.
Bishop: Such as.
McGee: Things started off relatively normal: opening the door for her, flowers, putting the seat down. Then around number 8, it gets uh...
Bishop: What?
McGee: Does she know you have these?
Bishop: Does she know you have these?
McGee: Yeah she wasn't happy when she found out.
Bishop: These are all very specific.
McGee: Yeah.
Bishop: These ideas apply to you?
McGee: No those rules weren't in place when we were together. At least I don't think so.
Bishop: What's with the two month cutoff? Abby's sabotaging herself. I've seen stuff like this before. We have to talk to her.